Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Alamo Springs District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA

Oldest recorded age at locality: 21.57
Youngest recorded age at locality: 20.49

mindat Locality ID: 33271
mindat URL: http://www.mindat.org/loc-33271.html

Tectonic Settings:

Total number of sublocalities beneath "Alamo Springs District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA": 22
Total number of bottom-level sublocalities: 13

Number of Child Localities: 4
Child Localities:
Alamo Group Of Claims
Kofa Game Range
Ocotillo
Wintersburg

Latitude: 33°22'47"N
Longitude: 113°58'21"W
Decimal Degree (lat, lon): 33.379722222222,-113.9725

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Allophane	Calcite	Copper	Malachite	None	Quartz

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al Au C Ca Cu H O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Calcite Copper Malachite None Quartz

5 IMA Minerals at location:

Calcite ()*	Chrysocolla ()*	Gold ()*	Malachite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	21.57	20.49	10	149372,149373,149374,149376,149377,149378,149379,149382,149383,149388	27770
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	21.57	20.49	2	149367,149377	3531
Gold ()*	Copper	Au	21.57	20.49	10	149372,149373,149374,149376,149377,149378,149379,149382,149383,149388	30554
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	21.57	20.49	2	149367,149377	12537
Quartz ()*	Quartz	SiO₂	21.57	20.49	6	149372,149374,149377,149378,149379,149383	61156

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Giersdorf_00000406	21.57	20.49	21.03±0.54	K-Ar				UAKA-72-48						33271	Alamo Springs District, Kofa Mts (S.H. Mts), Yuma Co., Arizona, USA	Turtleback Mountain Quad.	Shafiqullah et al. (1980)		AGSD12_201

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...